EP3834948A1 - Cartridge and method for manufacturing a cartridge - Google Patents

Abstract

The present invention relates to a cartridge (10) for an extrusion device, with at least one elongated film bag (18) which is not inherently rigid, which has a chamber (20) for receiving a mass (102) and a head part (12) for interacting with the film bag (18), the film bag (18) having an opening on a side facing the head part (12) which is closed by a cover (14). The cover (14) has a predetermined breaking area (88). A method for producing such a cartridge (10) is also described.

Description

The present invention relates to a method for producing a cartridge and a cartridge for an extrusion device and.

Cartridges are mainly used for storing material such as glue, sealant, mortar, paint or lubricants. In addition, the material can easily be applied to an object via the cartridges, provided that the cartridge is inserted into a corresponding ejection device. The material can be precisely applied using the extrusion device. For example, a rod of the extrusion device presses against a base of the cartridge, whereby the volume of the cartridge is compressed, so that the material located in the cartridge is pressed out of an opening. An attachment or a head part is attached to the cartridge in order to be able to apply the material to the object in a controlled and precise manner.

Cartridges are known from practice which are designed with a film bag which is not inherently rigid and an inherently rigid insert. The film bag has a cylindrical wall and a bottom part, the insert being connected to the film bag at an end remote from the bottom part. The insert is ring-shaped and has a circular opening closed with a cover, through which the chamber can be filled with the material. The cover is connected to the insert in a welding process. In a subsequent step, the insert is connected to the head part using an adhesive process.

However, the manufacture of such a cartridge is disadvantageously complex.

It is the object of the invention to provide a method for manufacturing a cartridge by means of which the cartridge can be manufactured easily. Another object of the invention is to provide a cartridge that is easy to manufacture.

The object is achieved by the subject matter of the independent claims. Advantageous embodiments relating to the subject matter of the independent claims can be found in the dependent claims.

• Bereitstellen eines eine Kammer aufweisenden Folienbeutels mit einer Öffnung, eines Kopfteils und eines eigensteifen Einsatzes mit einem Durchgang,
• Verbinden des Einsatzes mit dem Folienbeutel,
• Befüllen der Kammer mit einer Masse durch den Durchgang,
• Verschließen des Durchgangs mit einer Abdeckung.

A method is proposed for producing a cartridge for an extrusion device by means of the following steps:

• Providing a film bag having a chamber with an opening, a head part and an inherently rigid insert with a passage,
• Connecting the insert to the foil pouch,
• Filling the chamber with a mass through the passage,
• Close the passage with a cover.

According to the invention, it is provided that the insert is connected to the head part in a welding process, the welding process being carried out by introducing heat into the cover.

A cartridge can be produced simply and inexpensively by a method according to the invention, since the head part can be connected to the insert in a structurally simple manner by means of a welding device. A connection of the insert to the head part achieved in this way can be implemented in a particularly secure and stable manner, so that damage or leakage in this area is reliably prevented. In areas facing each other, the insert and the head part in particular have a respectively interacting and essentially oppositely designed contour, the cover arranged in the area of the contours being weldable. In this way, when the head part is connected to the insert, the cover can also be connected to the insert, preferably in the same step.

The head part enables the cartridge to be inserted into commercially available squeezing devices, so that the cartridge can be squeezed out in a controlled manner when the compound in the chamber is applied to a corresponding object.

In a simple and inexpensive embodiment of a method according to the invention, the insert is connected to the head part in an induction welding process. The connection of the head part to the insert is preferably made in a contactless manner, for example in a high-frequency welding process.

A welding tool for carrying out the welding process is preferably guided from a side of the film bag facing away from the head part over the film bag in the direction of the insert and the head part. The welding tool grips around the foil bag and the corresponding contours of the insert and the head part, preferably from the outside.

In an advantageous embodiment of a method according to the invention, it is provided that the welding tool is guided around a single film bag for connecting the insert assigned to this film bag to the head part. In particular, in a first step, a film bag is first connected to the head part via the insert and, if necessary, in a second step a second film bag is connected to the head part via the insert. This means that the individual foil bags can be individually adapted welding parameters can be connected. This is particularly advantageous if differently designed covers are used for the individual foil bags.

In an embodiment of the method according to the invention that can be carried out quickly and inexpensively, the welding tool is guided around at least two film bags together to connect the inserts assigned to the two film bags to the head part. If a space between the two chambers is not welded, this method is particularly suitable when using more viscous filling media. However, it is also possible for the space between the two chambers to be welded.

In an advantageous embodiment of a method according to the invention, a defined predetermined breaking area is produced in the area of the cover. The predetermined breaking area of the cover can be produced, for example, before the production of the foil bag, after the production of the foil bag or during the production of the foil bag. The predetermined breaking area is preferably only introduced into the cover after the compound has been poured into the chamber and the chamber has been closed by the cover. In this respect, for example, material of the cover is removed from an outside facing away from the chamber in order to form the predetermined breaking area. The predetermined breaking area can, however, also be produced before the cover is attached to the chamber. This also results in the possibility of forming the predetermined breaking area on an underside of the cover facing the chamber or of creating two opposing predetermined breaking areas on the lower and upper side.

In an advantageous embodiment of a method according to the invention, it is provided that the film bag has a film tube and a bottom part, the film tube preferably being formed by welding or gluing.

In an advantageous embodiment of a method according to the invention, it is provided that the predetermined breaking area of the cover by means of a laser, a material weakening by hot stamping or by thermal stamping with a heated stamp, by scoring with a suitable cutting tool or knife or during a Welding the cover to the insert is made. In this way, it can be achieved in a simple manner that the predetermined breaking area has, in particular, a different material thickness and / or strength than other areas of the cover and a defined predetermined breaking area is thereby formed.

When producing the predetermined breaking area during the welding process of the cover to the insert, in order to achieve the predetermined breaking area, preferably at least one welding parameter is varied in relation to the connection of the cover to the insert in further areas and for example a higher pressure, an increased temperature or an extended welding duration or a combination this parameter is used. The predetermined breaking area is created in the immediate vicinity of the weld seam or in the weld seam itself.

In an advantageous embodiment of a method according to the invention, it is provided that the insert has at least one material extension, in particular a material extension surrounding the passage, which melts during the closure of the passage. The tightness is improved as a result, since a material connection of the insert with the cover can be ensured due to the melt. The material extension can surround the passage of the insert. It acts as the intended melting point of the insert so that a high quality cover is provided and no mass can escape from the chamber through the opening.

In addition, in an advantageous embodiment of a method according to the invention, provision can be made for a second film bag with a chamber to be provided. The second film bag can be designed in a manner analogous to the first film bag and can be connected to the head part. The connection is preferably carried out by means of gluing or welding. Accordingly, a multi-component packaging or cartridge can be produced in a simple manner.

It can be provided that a different cover is provided for the various chambers.

In order to be able to ensure that the chambers are opened as synchronously as possible during the pressing out process of the cartridge, the covers of the various chambers can be designed with differently designed predetermined breaking areas, for example different notches.

A cartridge for an extrusion device is also proposed using such a method, the cartridge having at least one elongated film bag which is not inherently rigid and which has a chamber for receiving a mass, with a head part for interacting with the film bag and with an inherently rigid one Insert, is executed, the insert being connected to the film bag on a side facing the head part and having a passage closed by a cover.

According to the invention, it is provided that the insert and the head part have a mutually interacting and essentially oppositely designed contour in areas facing each other, the cover arranged in the area of the contours being weldable.

The technical advantages described in connection with the proposed method for producing the cartridge apply analogously to a cartridge designed according to the invention. A cartridge designed according to the invention is thus advantageously easy to manufacture, the cover preferably not only being connectable to the insert in a welding process, but the insert by means of the cover alternatively or additionally also being connectable to the head part by means of a welding process. A welding tool provided for this purpose preferably has a cylindrical recess essentially corresponding to the film bag and can be guided around the film bag in the direction of the insert from a side facing away from the head part, the welding tool being designed to cover the cover at least in the area of the contours of the insert and the To heat the head part in such a way that the insert can be welded to the head part by means of the cover. The welding tool preferably engages around the respective film bag on the outside.

An "inherently rigid component" is understood to mean a component which retains its shape if it is removed from a device. Such a component is also referred to as inherently stable.

In an advantageous embodiment of a cartridge according to the invention, it is provided that the contour of the insert and the head part each have two surfaces arranged at an angle to one another. The stability of a connection between the insert and the head part is advantageously great here.

The connection between the insert and the head part is particularly stable due to the favorable force relationships present when the surfaces of the insert and the head part are arranged essentially perpendicular to one another.

Likewise, the cover can lie against at least two, for example, essentially perpendicularly to one another surfaces of the stepped raised elevation. In this way, the cover can also be attached to the insert in a stable manner on the underside and in the receptacle of the head part on the top. Furthermore, this also reduces the leakage.

A stable connection of the head part to the insert can be achieved if the insert has a stepped raised elevation on its side facing the head part, over which the insert is received in a receptacle of the head part, which is provided for the arrangement of the insert. It can be provided that the stepped raised elevation of the insert protrudes from the film bag. The elevation enables a stable reception of the insert in the receptacle of the head part. In addition, this improves the tightness during operation.

In an advantageous embodiment of the invention, it is provided that the cover has a predetermined breaking area. This provides a cover that is easy to handle. On the one hand, the cover securely closes the foil pouch and prevents unwanted leakage of the material in the chamber from the chamber. On the other hand, the cover enables a simple and safe and in particular defined opening in order to be able to dispense the mass located in the chamber. The opening properties are improved by the predetermined breaking area, in particular when the cartridge is used in an extrusion device.

Due to the predetermined breaking area in the cover, the cartridge can be opened in a particularly defined manner in an extrusion device with comparatively low forces. At the same time, the cover can be made so stable in a simple manner that self-opening of the cartridge is reliably prevented, for example if it accidentally falls down. By means of the cover, leakage of the mass located in the cartridge can also be prevented in a simple manner to a very small extent or completely and, in particular, is significantly reduced in comparison with known cartridges.

The cover is designed in particular as a film, alternatively, for example, can also be designed in the form of a plate and represent a plastic plate, for example.

The predetermined breaking area can easily have any shape and, depending on the application, for example, be round, oval, square, rectangular, angular or linear or have a combination of these shapes.

In an advantageous embodiment of a cartridge according to the invention, it is provided that the cover has a defined material discontinuity in the predetermined breaking area, at least in some areas, in particular in an entire flat area, than in a further area of the cover. The cover is designed to be simple in construction and can be produced cost-effectively, allowing the cover to be opened reliably and in a defined manner in the predetermined breaking area. The defined material discontinuity can be formed, for example, in that the cover is enlarged at least in some areas in the predetermined breaking area or has a reduced material thickness than in a wider area of the cover. This enables the cover to be opened safely and in a defined manner in the predetermined breaking area. Such a cover can also be produced simply and inexpensively.

The predetermined breaking area of the cover can also have a defined different material strength than a further area of the cover. This also enables the cover to be opened reliably and in a defined manner in the predetermined breaking area.

A further area of the cover is understood here to mean an area of the cover that is not assigned to the predetermined breaking area and extends outside the defined predetermined breaking area. In the further area of the cover there are preferably essentially constant material properties.

In an advantageous and particularly inexpensive to manufacture embodiment of a cartridge according to the invention, the predetermined breaking area of the cover is delimited by a linear material weakening. The linear material weakening particularly completely encompasses the predetermined breaking area and thus separates the predetermined breaking area from the further area of the cover. The linear material weakening can be both a continuous, in particular uniform, material weakening as well as a perforation, the material thickness or the material strength of the linear material weakening being both smaller and greater than the material thickness of the further area of the cover.

In order to be able to achieve a defined opening of the cover in the state of use, it is provided in an advantageous embodiment of the invention that the predetermined breaking area of the cover has a defined different material strength than a further area of the cover. A different strength or a different structural structure than in the further area of the cover can be provided in the predetermined breaking area completely or in an area encompassing the predetermined breaking area linearly. This can be achieved, for example, by the action of temperature, in particular by means of laser or energetic radiation.

The predetermined breaking area of the cover can preferably have a notch that is star-shaped, cross-shaped, line-like, circular, semicircular or the like. The special geometry of the notch enables the pressure required to open the cartridge to be adjusted. In addition, the shape and spatial arrangement of the notch can be used to influence the opening characteristics.

In an advantageous embodiment of the invention, the insert is designed to be conical on a side facing the head part. This creates a cartridge in a structurally simple manner can be provided in which a cover connected to the insert can be easily and securely fastened to the insert under all conditions and securely holds on the insert. Furthermore, undesired peeling or shearing off and / or damage to the cover, which is embodied, for example, as a film, is reliably prevented as a result of the favorable introduction of force. Due to the conical design of the insert, it can be achieved that in the event of a pressure increase in the chamber before opening, a notch effect in the connection area of the cover to the insert is low and the cover is reduced by the application of pressure when the cover or the film expands is opened reliably in the area of the predetermined breaking point during an extrusion process.

It has been found to be particularly advantageous if a surface of the insert facing the head part encloses an angle between 10 ° and 50 ° with a horizontal perpendicular to a central axis of the film bag, with a region of the surface facing the central axis being at a greater distance from a base part of the film bag has as a region of the surface facing away from the central axis. The angle particularly preferably has a value between 15 ° and 35 °, in particular approximately 25 °.

In order to be able to fill the foil bag particularly quickly and to safely allow the air present in the foil bag to escape, the insert can have at least one ventilation opening independent of the passage and / or at least one ventilation slot independent of the passage. The passage is in particular circular and, when the film bag is being filled, is preferably at least approximately close to a filling tube of a filling device. Air located in the chamber of the film bag can easily escape through the ventilation opening and / or the ventilation slot. After the filling process, the ventilation opening and / or the ventilation slot can in particular be closed in a sealing manner by the cover, so that the mass located in the chamber is sealed in.

As an alternative or in addition to this, the passage of the insert can have at least one ventilation notch in an area facing the central axis of the film bag, so that air is present in the chamber of the film bag when the film bag is filled with a filling device that has a filling tube with a circular cross-section can escape through the vent notches directly along the filling tube.

Both the provision of the ventilation opening or the ventilation slot and the provision of ventilation notches prevent the occurrence of high pressures during a filling process, as a result of which the filling process can be carried out inexpensively.

A plurality of ventilation openings and / or ventilation slots are preferably provided, which in particular are arranged on the insert in a uniformly distributed manner around the circumference.

In an embodiment of the invention that is structurally simple to produce, the ventilation openings have an essentially circular cross section. The ventilation slots are preferably arranged essentially concentrically to a central axis of the insert.

The ventilation notches can have a substantially rectangular, triangular, curved or comparable shape.

The film bag can preferably be formed by a cylindrical film tube which is closed on the bottom side by a bottom part, the bottom part in particular being glued and / or welded to the film tube. The tubular film, also called tubular film or blown film, can be formed from a thermoplastic material, wherein the tubular film can be extruded or welded or glued at its longitudinal seam. Since the bottom part is especially glued and / or welded, there is a material connection, whereby the storage properties of the cartridge are improved, so that a leakage rate of the cartridge is reduced compared to a cartridge in which a film bag is closed by a clip closure.

The head part of the cartridge represents a type of adapter, since the head part enables commercially available attachments or standardized squeezing devices to be used to apply the mass located in the cartridge. The insert, which may partially protrude beyond the foil bag, thus represents an interface to the head part.

In one embodiment, the head part has an outlet connection that is in fluid connection with the receptacle. The outlet connection can define the flow rate, in particular via its diameter.

It can be provided that the outlet connection has a thread. Commercially available attachments or extrusion devices for applying the compound located in the cartridge can be fastened precisely to an outlet opening of the outlet nozzle through the thread, so that the compound can be precisely positioned and metered during application.

The outlet stub can also have a partition which divides the volume into two or more outlet channels. The relative position of the partition wall in the outlet nozzle defines the cross-sections of the outlet channels and thus the flow rates through these outlet channels.

The outlet channels can have different diameters. The outlet channels can be oriented coaxially to one another.

The head part can thus be suitable for receiving a plurality of foil bags which can have different masses. The head part separates the different masses up to the outlet opening, so that the different masses can only come into contact after the outlet opening. This is important for two-component adhesives, for example.

The cartridge can thus accommodate different masses and serve as multi-component packaging. The different diameters of the outlet openings make it possible to set a special mixing ratio for the different masses.

The masses located in the cartridge can be a chemical mass or a liquid, for example components of a two-component mixture.

In this way, sealing compounds, multi-component mortars, multi-component coating compounds, multi-component paints, multi-component foam precursors, multi-component adhesives, multi-component sealing compounds and multi-component lubricants can be stored in the corresponding cartridges.

The receptacle of the head part can be assigned an expansion space into which the cover can expand. The expansion space enables the cover to be opened in a controlled manner so that it does not hinder the flow of the outflowing mass. On the one hand, this results in a laminar flow, since there are no obstacles in the flow path that could result in a turbulent flow. On the other hand, this ensures that the flow rate is precisely maintained, which is important for the mixing ratio of two or more components.

In one embodiment, the passage is tapered. As a result, the passage acts like a cone or a nozzle when the mass flows out. The conically tapering passage can also act as a diffuser when filling the foil bag.

The passage can in particular be adapted to a filling cone of the mass located in the chamber. This enables the chamber to be optimally filled with a mass, so that little or no air is left in the chamber.

In one embodiment, the cartridge has at least one second, elongated film bag which is not inherently rigid and has a chamber for receiving a mass. The cartridge can thus be used as a multi-component packaging. So that a resin, for example an epoxy resin and a hardener for a two-component adhesive can be stored in the same packaging.

The second film pouch can have the same length as the first film pouch, in which case a ratio of the base areas of the film pouch determines a mixing ratio to be achieved. As an alternative to this, it can also be provided that two foil bags are used which have a length that deviates from one another.

The bottom part can be made of a plastic such as, for example, polyethylene (PE), polypropylene (PP), polyethylene terephthalate (PET), polybutylene terephthalate (PBT), and / or acrylonitrile-butadiene-styrene copolymer (ABS). It can be provided that the bottom part is manufactured by injection molding, 3D printing or by machining. It can also consist of a preformed mono- or multilayer film. It can be that the base part is formed from the same or a comparable material as the cover. This enables the bottom part to be manufactured inexpensively.

The film pouch can comprise a mono- or multilayer film. The total layer thickness is 50 to 350 μm, in particular 80 to 150 μm. The materials used can be PE, PP, PET, aluminum, ethylene-vinyl alcohol copolymer (EVOH), polyamides (PA), and / or polylactides (PLA). A coating with silicon oxide or aluminum oxide can also be provided for each layer. The multilayer film can be produced by adhesive or extrusion lamination.

The film bag can preferably be evenly collapsed during an extrusion process, similar to an accordion, so that as much as possible the entire mass in the chamber can be used. When in use, the foil pouch is exposed to chemical substances or liquids which can sometimes attack the foil pouch. An exact composition of the foil bag must therefore sometimes be adapted to the mass located in the chamber or to the liquid located in the chamber, in particular to the corresponding material properties.

The cover can preferably be designed as a multilayer film.

For example, the cover has a PE and / or a PP layer on the top and bottom so that it can be welded, for example thermally welded, to other plastic parts of the cartridge. The film can also have layers of PVC, especially if other plastic parts of the cartridge are made of PVC.

A barrier layer can be provided between an upper side and an underside of the cover, which, for example, prevents oxygen or water vapor from entering the chamber after it has been closed by the cover. In this way outgassing of the mass located in the chamber can also be reliably prevented.

The total thickness of the cover can be between 50 µm and 350 µm. In particular, it is provided that the total thickness is between 130 μm and 250 μm.

The barrier layer can for example comprise aluminum or coatings of silicon oxide and / or aluminum oxide on PET, bi-axially arranged PP (BOPP), PA, PLA, or ethylene-vinyl alcohol copolymer (EVOH).

For chemically active masses, i. H. demanding filling goods, multilayer films are preferred.

Further advantages emerge from the following description of the figures. Various exemplary embodiments of the present invention are shown in the figures. The figures, the description and the claims contain numerous features in combination. The person skilled in the art will expediently also consider the features individually and combine them into meaningful further combinations.

Fig. 1

einen Längsschnitt durch eine erfindungsgemäße Kartusche in einer ersten Ausführungsform in Explosionsdarstellung;

Fig. 2a

eine Detailansicht des Einsatzes aus Fig. 1 mit einer als Folie ausgeführten Abdeckung in einem Längsschnitt;

Fig. 2b

eine Detailansicht einer weiteren Ausführungsform eines Einsatzes zur Anbindung einer als Folie ausgeführten Abdeckung gemäß Fig. 2a in einem Längsschnitt;

Fig. 2c

eine Detailansicht des Einsatzes gemäß Fig. 2b mit einer als Kunststoffplatte ausgeführten Abdeckung;

Fig. 3a

eine Draufsicht auf die Kartusche aus Figur 1 mit dem Sollbruchbereich;

Fig. 3b

eine Draufsicht auf die Kartusche aus Figur 1 mit einer weiteren Ausführungsform des Sollbruchbereichs

Fig. 4

einen schematischen Vergleich, der die Kammer aus Figur 1 mit einer aus dem Stand der Technik bekannten Kammer und deren Auspressverhalten vergleicht;

Fig. 5

eine schematische Darstellung des erfindungsgemäßen Verfahrens zur Herstellung einer erfindungsgemäßen Kartusche in einer zweiten Ausführungsform;

Fig. 6

eine vereinfacht gezeigte Kartusche und eine Füllvorrichtung zur Befüllung einer Kammer der Kartusche gemäß Fig. 1 mit einer chemischen Masse;

Fig. 7

einen Längsschnitt durch und eine Draufsicht auf eine Ausgestaltung des Einsatzes;

Fig. 7a -

7cschematische Draufsichten auf weitere Ausgestaltungen des Einsatzes;

Fig. 8

eine Draufsicht auf eine weitere Ausgestaltung des Einsatzes;

Fig. 9

eine Detailansicht eines Entlüftungsschlitzes des Einsatzes aus Figur 8;

Fig. 10

eine Draufsicht auf eine weitere Ausgestaltung des Einsatzes;

Fig. 11

eine Detailansicht einer Entlüftungseinkerbung des Einsatzes aus Figur 10;

Fig. 12

eine alternativ ausgeführte Kartusche, bei der ein Folienschlauch und ein Bodenteil miteinander verschweißt sind;

Fig. 13a

einen schematisch gezeigten Aufbau der Abdeckung;

Fig. 13b

einen schematischen Aufbau einer alternativ ausgeführten Abdeckung;

Fig. 14

einen schematischen Aufbau einer weiteren alternativ ausgeführten Abdeckung;

Fig. 15 - 19

Ausschnitte von verschiedenen Ausführungen von Abdeckungen, die sich über die jeweilige Ausführung des Sollbruchbereichs voneinander unterscheiden;

Fig. 20

eine Seitenansicht und eine Draufsicht einer weiteren Ausführungsform einer Kartusche mit zwei Folienbeuteln, wobei die Folienbeutel in einem Schweißverfahren gemeinsam mit dem Kopfteil verbunden sind; und

Fig. 21

eine Seitenansicht und eine Draufsicht einer weiteren Ausführungsform einer Kartusche mit zwei Folienbeuteln, wobei die Folienbeutel in einem Schweißverfahren separat mit dem Kopfteil verbunden sind.

In the figures, the same and similar components are numbered with the same reference numerals. Show it:

Fig. 1

a longitudinal section through a cartridge according to the invention in a first embodiment in an exploded view;

Fig. 2a

a detailed view of the insert Fig. 1 with a cover designed as a film in a longitudinal section;

Figure 2b

a detailed view of a further embodiment of an insert for connecting a cover designed as a film according to FIG Fig. 2a in a longitudinal section;

Figure 2c

a detailed view of the insert according to Figure 2b with a cover designed as a plastic plate;

Fig. 3a

a top view of the cartridge Figure 1 with the predetermined breaking range;

Figure 3b

a top view of the cartridge Figure 1 with a further embodiment of the predetermined breaking area

Fig. 4

a schematic comparison showing the chamber Figure 1 compares with a chamber known from the prior art and its extrusion behavior;

Fig. 5

a schematic representation of the method according to the invention for producing a cartridge according to the invention in a second embodiment;

Fig. 6

a cartridge shown in simplified form and a filling device for filling a chamber of the cartridge according to FIG Fig. 1 with a chemical mass;

Fig. 7

a longitudinal section through and a plan view of an embodiment of the insert;

Fig. 7a -

7c schematic top views of further configurations of the insert;

Fig. 8

a plan view of a further embodiment of the insert;

Fig. 9

a detailed view of a vent slot of the insert Figure 8 ;

Fig. 10

a plan view of a further embodiment of the insert;

Fig. 11

a detailed view of a vent notch of the insert Figure 10 ;

Fig. 12

an alternatively designed cartridge in which a film tube and a base part are welded to one another;

Figure 13a

a schematically shown structure of the cover;

Figure 13b

a schematic structure of an alternatively designed cover;

Fig. 14

a schematic structure of a further alternatively designed cover;

Figures 15-19

Excerpts from different designs of covers that differ from one another in terms of the respective design of the predetermined breaking area;

Fig. 20

a side view and a plan view of a further embodiment of a cartridge with two foil bags, the foil bags being jointly connected to the head part in a welding process; and

Fig. 21

a side view and a plan view of a further embodiment of a cartridge with two foil bags, the foil bags being connected separately to the head part in a welding process.

Embodiments:

Figure 1 shows a cartridge 10 in an exploded view in a longitudinal section.

The cartridge 10 comprises a head part 12, two covers 14, two inserts 16 and two foil bags 18.

The film bags 18 are not designed to be inherently rigid and each have a cylindrical and essentially elongated shape. The film bags 18 each delimit a chamber 20 and have an opening 22, the chamber 20 being particularly closable by the film bags 18.

In the embodiment shown, the film bag 18 is formed by a base part 24 and a film tube 26. The base part 24 has a base area 28 and a collar 30 extending around the base area 28. The film tube 26 is attached on the outside to the collar 30 by welding or gluing. In principle, the film tube 26 can also be fastened on the inside of the collar 30 by welding or gluing.

The film tube 26 can be produced, for example, from a film by gluing or welding edge areas. It can also be provided to use an already prefabricated film tube or a prefabricated film bag.

The base area 28 is circular, for example, so that the chamber 20 is configured in the shape of a cylinder. In principle, however, any shape of the base area 28 is conceivable, for example rectangular or polygonal.

The insert 16 is designed to be inherently rigid and is inserted on the inside through the opening 22 at least partially into the corresponding chamber 20 of an associated film bag 18.

Fig. 2a , Figures 2b and 2c show different design variants of an insert 16 or a cover 14, the inserts 16 each being provided for connection to a film bag 18.

The insert 16 according to Fig. 2a has in one piece three sections 32, 34 and 36 which are arranged one on top of the other with respect to a longitudinal direction L of the film bag 18 or the cartridge 10, that is to say adjoin one another in each case. The first section 32 is arranged on a side facing away from the head part 12 and the third section 36 is arranged on a side facing the head part 12. The first section 32 has, for example, a thickness D1 in the longitudinal direction L of in particular less than 4 mm, and the second section 34 has a thickness D2 in the longitudinal direction L of in particular less than 5 mm and the third section 36 has a thickness D3 in the longitudinal direction L of in particular less than 5 mm.

An inner side 38 of the first two sections 32 and 34 facing the chamber 20 and of a first area of the third section 36, which extends from the transition of the second section 34 to the third section 36 to a bend 40, has an angle α with respect to a vertical V , which can assume values from 0 to 45 °. As a result, the chamber tapers in the direction of the head part 12.

The inner side 38 of the third section 36 has, on a side facing the head part 12, above the bend 40, a second region which has an angle β with respect to a horizontal H arranged perpendicular to the longitudinal axis L. The angle β can have a value between 0 ° and 60 °.

The third section 36 has an outer side 42 facing away from the chamber 20 and comprising two surfaces 44 and 46. The surface 46 is arranged in the longitudinal section parallel to the horizontal H and thus to the base surface 28, whereas the surface 44 in the longitudinal section has an angle δ with respect to the vertical or the longitudinal direction, but in an alternative embodiment also essentially parallel to the vertical V. can be arranged.

Accordingly, the surfaces 44 and 46 can be arranged essentially perpendicular to one another in the longitudinal section.

Figure 2b FIG. 11 shows a further embodiment of the insert 16, which extends from the insert 16 according to FIG Fig. 2a differs essentially in that the third section 36 has a conical region which encompasses the surface 46 and faces the head part 12. The surface 46 facing the head part 12 forms an angle ε of 10-50 ° with the horizontal H, particularly preferably of about 15 ° -35 °. The surfaces 44 and 46 are not arranged perpendicular to one another in the longitudinal section and here enclose an obtuse angle. Furthermore, the radially outer surface 42 of the third section 36 is arranged essentially in the longitudinal direction L.

The in Figure 2c The insert 16 shown corresponds essentially to the insert 16 according to FIG Figure 2b , the cover 14 being designed as a plastic plate in the exemplary embodiment shown.

The third section 36 of the inserts 16 according to FIG Fig. 2a and 2 B is set back with respect to the outer side 42 with respect to the second section 34, the third section 36 having a smaller outer diameter than the second section 34. As a result, a stepped raised elevation 48 of the insert 16 is formed.

The third section 36 has a width 50 of 3 to 8 mm in the direction of the horizontal H and is offset inwardly by a radial offset 52 of 2 to 4 mm with respect to the second section 34.

On the surface 46 facing towards the head part 12 and thus facing upwards, which is essentially parallel to the horizontal H, a material extension 54 is provided which protrudes essentially perpendicularly from the surface 46 parallel to the horizontal H, that is, in the longitudinal direction L. The Material extension 54 has a predefined height 56, as will be explained below, and a width 58 of in particular less than 2 mm.

The outside 42 of the first section 32 has an angle γ between 0 and 10 ° with respect to the vertical V and the outside 42 of the third section 36 forms an angle δ of 0 to 60 ° with the longitudinal direction L.

The inner side 38 of the sections 32, 34, 36 facing the chamber 20 encloses a passage 60 which, starting from the first section 32, tapers conically in the direction of the third section 36. In this respect, the passage 60 in the area of the first section 32 has a larger opening 61 compared to the opening 63 in the area of the third section 36.

In addition, the insert 16 has a plurality of holes 62 in the third section 36, which are arranged between the material extension 54 and a radially inwardly pointing tip 64 of the third section 36 and run essentially in the longitudinal direction L here.

In principle, the insert 16 is designed in the shape of a ring, so that it can be coupled to the cylindrical film tube 26.

The inside of the film tube 26 is connected to the insert 16, the film tube 26 being connected to the outside 42 of the first section 32. The film tube 26 is preferably welded or glued to the insert 16.

The cover 14 is provided between the head part 12 and the insert 16, as shown in FIG Fig. 1 emerges. In the assembled state of the cartridge 10, the cover 14 rests in radially outer regions on the step-shaped elevation 48, essentially on the two surfaces 44 and 46.

The cover 14 is connected to the insert 16, for example by welding or gluing, and closes the passage 60 and the holes 62. Accordingly, the cover 14 closes the chamber 20 so that the chamber 20 is preferably completely sealed when the cover 14 is installed.

In the in Fig. 1 In the illustrated embodiment, the head part 12 has two receptacles 66 which, in the assembled state, interact with the inserts 16 and the cover 14. The receptacle 66 is divided into two areas, as well as from the Fig. 3a can be found.

In a support area 68, the receptacle 66 is adapted to the insert 16 and the stepped elevation 48, so that the insert 16, as in FIG Fig. 1 can be seen, with the cover 14 rests against a side surface 70 of the receptacle 66, that is to say over its radially outwardly facing outer side 42, in particular that of the third section 36, and, as in FIG Fig. 3a can be seen, rests on the support area 68, with the cover 14 lying therebetween.

Furthermore, the receptacle 66 comprises an expansion region 72 which is designed as a recess in the receptacle 66 and, as in FIG Fig. 1 can be seen, forms a spreading space 74, the function of which will be explained later.

The head part 12 furthermore has an outlet connection 76 with an outlet opening 78 and an outlet channel 80. The outlet opening 78 is in fluid connection with the expansion space 74 and the receptacle 66 through the outlet channel 80.

The in Fig. 1 The outlet nozzle 76 shown has two outlet channels 80 which are in fluid connection with the respective receptacle 66 and are separated from one another by a partition 82 which extends from a connecting web 84 separating the receptacles 66 to the outlet opening 78.

It can be provided that the two outlet channels 80, as in FIG Fig. 1 and Fig. 3a shown, have a different cross section, in particular a different diameter, in order to set a mixing ratio of the masses, as will be explained below.

The outlet stub 76 also has a thread 86 by means of which an attachment, which cannot be seen, can be attached to the outlet opening 78 of the head part 12. This attachment can be part of an extrusion device into which the cartridge 10 can be inserted or inserted.

The cover 14 comprises a predetermined breaking area 88 which, when the cartridge 10 is connected to the head part 12, is arranged in the area of the expansion area 72 of the receptacle 66. In the present case, the cover 14 has a lower material thickness or material strength in the predetermined breaking area 88 than in other areas of the cover. Due to the lower material thickness, the cover 14 is correspondingly weakened in areas in the predetermined breaking area 88.

The predetermined breaking area 88 can be generated in the cover 14, for example, by a laser or by a heated stamp. The predetermined breaking area 88 can be generated, for example, after the cover 14 has been arranged on the insert 16, preferably from a side facing away from the chamber 20. As an alternative or in addition to this, the predetermined breaking area 88 can also be generated from a side of the cover 14 facing the chamber 20. For example, areas lying opposite one another can be machined from both sides of the cover 14, so that the predetermined breaking area 88 extends on both sides of the cover 14. The predetermined breaking area 88 can also be generated by deforming material by means of a stamp or by melting material by means of a stamp. It can also be provided that material in the predetermined breaking area 88 is vaporized by means of a laser, in particular on a side facing away from the chamber 20, so that the predetermined breaking area 88 represents, for example, an externally visible notch in the cover 14. If the predetermined breaking area 88 is produced by hot stamping, the predetermined breaking area 88 is also visible from an outside. The predetermined breaking area 88 can also be produced by scribing. The predetermined breaking area 88 can also be produced by the methods mentioned before the cover 14 is attached to the insert 16.

Figure 3b shows a view similar to Fig. 3a , whereby in the following only the differences are discussed. The predetermined breaking area 88 is here arranged in an area of the expansion area 72 which faces the respective other film bag 18. In Figure 3b a circumferential weld seam 89 is shown, by means of which the cover 14 is fixed to the surface 46 of the insert 16. The weld seam 89 is delimited in a simplified manner by two circles 91, 93, shown here in dashed lines, which run essentially concentrically to a longitudinal axis of the film bag 18, the weld seam 89 here representing a partial area of the surface 46. In the present case, the predetermined breaking area 88 represents, for example, a section of the weld seam 89, the predetermined breaking area 88 being at least regionally, in particular completely congruent with the welding seam 89. As an alternative to this, the predetermined breaking area 88 can also be located in the immediate vicinity of the weld 89. The predetermined breaking area 88 is produced during the production of the weld seam 89 by varying welding parameters.

The predetermined breaking area 88 is a targeted weakening of the cover 14, so that when the film bag 18 or the chamber 20 is pressed out by an extrusion device, the cover 14 in the predetermined breaking area 88 tears or opens there in a defined manner.

While the cartridge 10 is being pressed out, the bottom part 24 of the chamber 20 is pressed in the direction of the head part 12, for example by means of a stamp of an ejection device. This leads to the fact that the pressure in the chamber 20, which is directed in the direction of the cover 14, increases, as a result of which the mass located in the chamber 20 is pressed against the cover 14. The cover 14 then expands into the expansion region 72. The predetermined breaking area 88 of the cover 14 is assigned to the expansion area 72, the predetermined breaking area 88 breaking above a certain force or a corresponding pressure, so that the mass passes through the passage 60 of the insert 16 and the torn predetermined breaking area 88 from the chamber 20 into the outlet channel 80 can flow. The mass can thus flow out of the head part 12 through the outlet opening 78 and be applied, for example, to an object.

Because after the chamber 20 has been completely squeezed out, the mass located in the expansion space 74 and in the outlet channel 80 cannot be pushed further out of the outlet opening 78, the outlet channel 80 and the expansion space 74 should be kept as small as possible.

It has been found to be advantageous if the expansion area 72, which is assigned to the chamber 20, has an area of 1-40% based on the total area of the respective receptacle 66 or 68, better 2-35% and preferably 3-30% . The expansion height 90 of the expansion space 74 should be between 2.0 and 15.0 mm, in particular 3.0 and 12.0 mm and preferably 5.0 and 10.0 mm.

The opening force required to break up the predetermined breaking area 88 can be adapted by changing the expansion area 72. Furthermore, it is also possible to adapt the opening force through a corresponding arrangement of the predetermined breaking area 88 on the cover 14 or the shape and size of the predetermined breaking area 88.

For example, the required opening force is increased if the predetermined breaking area 88 is displaced from a central area in an edge area of the expansion surface 72.

The expansion area 72 and the predetermined breaking area 88 are selected in such a way that the two chambers 20 essentially break open when the opening force is identical, so that the masses can flow out of the chambers 20 synchronously. Accordingly, a predetermined mixing ratio of the masses from the two chambers 20 can be implemented, which is predetermined by an area ratio of the base areas 28 or the division of the outlet channel 80 by the partition 82.

Fig. 4 shows a schematic comparison between the chamber 20 of the cartridge 10, which is in the upper half of the Fig. 4 is arranged, and a chamber 92 of a cartridge 94 known from the prior art, which is arranged in the lower half of the figure, in a longitudinal section.

The left side of the Fig. 4 shows the cartridges 10, 94 in a filled state and the right side of the Fig. 4 the cartridges 10, 94 in a pressed or emptied state.

In the filled state, the cartridges 10, 94 in the present example are enclosed by a cuboid 96 of equal volume, which is shown with dashed lines. A width B, a length L and a height (not shown) of the two cuboids 96 are essentially the same here.

The chamber 92 of the cartridge 94 from the prior art is closed on both sides by clips 98. The clips 98 result in the chamber 92 being closed in a spherical shape at each end, so that the chamber 92 has a smaller volume than the cuboid 96 according to the cartridge 10 according to the invention. Accordingly, more mass can be poured into the chamber 20 than into the chamber 92.

The pressing out of the cartridges 10, 94, represented by an arrow, results in the longitudinal sides of the chambers 20, 92 being compressed and arching like an accordion.

The chamber 20 of the squeezed out cartridge 10 is enclosed by a cuboid 100. The cuboid 100 is smaller than the cuboid that encloses the squeezed out chamber 92 from the prior art, so that the squeezed out chamber 20 has a smaller volume than the squeezed out chamber 92 from the prior art. Accordingly, the cartridge 10 can accommodate more mass than the cartridge 94 known from the prior art with the same available initial volume according to cuboid 96, and less mass remains in the cartridge 10 after it has been pressed out compared to the cartridge 94 from the prior art.

Based on Fig. 5 and Fig. 6 The method for producing a cartridge 10 according to a further embodiment will now be described, which essentially corresponds to the embodiment described in more detail above, so that only the differences will be discussed below. Identical components are provided with the same reference symbols, and reference is made to the above explanations with regard to their structure and their function.

In contrast to the first embodiment, the cartridge 10 in FIG Figure 5 only one chamber 20, so that only one insert 16, one cover 14, one receptacle 66 and one outlet channel 80 are available. Accordingly, no partition 82 is provided, which divides the outlet channel 80 into partial channels.

In a first method step, the steps are represented by arrows, the base part 24 and the insert 16 are provided. A film tube 26 is then attached to the outside of the collar 30 on the circumferential side or circumferentially around the base part 24, for example by gluing or welding, so that a film bag 18 is produced which has an opening 22. The film tube 26 can also be attached to the collar 30 on the inside.

The inside of the opening 22 is then attached to the outside 42 of the insert 16 in the area of the first section by welding and / or gluing.

In a next, in Fig. 6 In the apparent step, the chamber 20 is filled with a compound 102 by a filling device 104 which has a filling head 106 and a filling tube 108. The fill head 106 and the fill tube 108 are in fluid communication with one another.

The filling head 106 is connected, for example, to a reservoir of the mass 102 and pumps the mass 102 out of the reservoir into the filling head 106. The filling tube 108 protrudes through the opening 63 and the passage 60 of the insert 16 into the chamber 20, so that the mass 102 can be introduced from the filling head 106 through the filling tube 108 into the chamber 20.

During the filling process, the air in the chamber 20 can escape through the holes 62, so that the filling tube 108 can have the same cross section as the opening 63 of the third section 36 of the insert 16. The mass 102 can thus be introduced into the chamber 20 through a large opening, so that little pressure is required for the filling process.

The geometry of the insert 16 is adapted to a filling cone 110 of the chemical compound 102. The geometry is particularly adapted to the filling cone 110 of viscous chemical mortar. It is thus achieved that relatively little and in particular no air is present between the insert 16 and the chemical mass 102 after the filling process. This is advantageous since the presence of air can reduce the durability of the mass 102 and, in the case of larger air bubbles, can have an undesirable effect on the mixing ratio achieved when using two film bags 18.

After the filling process, as in Fig. 5 shown, the cover 14 is attached to the insert 16.

In order to be able to close the opening 63 tightly, a material extension 54, which runs all the way around here and is connected to the third section 36 of the insert 16, can be provided, which can be designed in an annular manner. A plurality of separate material extensions 54 can also be provided, which are, for example, partially ring-shaped and each extend only over a partial area of the circumference of the insert 16. The at least one material extension 54 serves as a melting point, so that the cover 14 and the insert 16 can be connected to one another in one piece, in particular with a material fit, in that the material extension 54 is melted.

The cover 14 is also attached to the surfaces 44 and 46 of the insert 16. For example, the molten material of the material extension 54 flows along the surfaces 44, 46 to form a type of adhesive layer for the cover 14.

The cover 14 can be designed as a monofilm. After the insert 16 has been closed, a part of the cover 14 is removed from the top of the cover 14, so that a predetermined breaking area 88 is created. This takes place, for example, in the closed state of the chamber 20, in that material of the cover 14 is removed from the outside.

When the cover 14 is fastened to the surface 46 of the insert 16 by welding, the predetermined breaking area 88 can be formed by a defined setting of the welding parameters in a predefined area. For example, a higher pressure, an increased temperature or an extended welding duration or a combination of these parameters can be provided in order to produce the predetermined breaking area 88 during the welding process of the cover 14 to the insert 16. The predetermined breaking area 88 can be produced in a simple manner in the immediate vicinity or in the surface 46.

In a further method step, the head part 12 is provided and the insert 16 is fastened with the cover 14 in the receptacle 66. In particular, the surface 44 of the stepped elevation 48 rests against the side surface 70 of the receptacle 66. This process step can take place, for example, by gluing or welding or a similar fastening method.

Fig. 7 shows the insert 16 in a longitudinal section in the upper area and a corresponding plan view of the insert 16 in a lower area.

From the top view according to Fig. 7 It can be seen that the holes 62 are arranged as vent openings 112 circumferentially around the opening 63 and have a diameter 114 of in particular less than 3 mm. In the present embodiment, the insert 16 has eight vents 112. In principle, any number of ventilation openings 112 can be provided. The ventilation openings 112 can be designed as ventilation bores.

Based on FIGS. 8 to 11 further embodiments of holes 62 are shown.

The top view of the insert 16 according to FIG Figure 8 shows that the holes 62 are designed as ventilation slots 116 which are arranged circumferentially around the opening 63, in particular at regular intervals from one another and / or coaxially to the central axis of the opening 63.

Fig. 9 FIG. 11 shows a detailed view of one of the ventilation slots 116 from FIG Fig. 8 . A width 118 of the ventilation slot 116 in the radial direction is in particular less than 3 mm and a length 120 in the circumferential direction is, for example, 1 to 20 mm.

In Fig. 10 it can be seen that the holes 62 can also be designed as ventilation notches 122. In this embodiment, the ventilation notches 122 function as an enlargement of the opening 63, the original shape of which is shown in dashed lines in the area of the ventilation notches 122.

A detailed view of a vent notch 122 is shown in FIG Fig. 11 from which it can be seen that a width 124 of the ventilation notch 122 in the circumferential direction has a value in particular less than 4 mm.

Figures 7a, 7b and 7c show further possible embodiments of inserts 16 for venting the film bag 18 during a filling process. A contour 123 of the insert 16 lying on the inside in the radial direction is in contrast to the embodiment of the insert 16 according to FIG Fig. 1 not circular. In Figure 7a the inner contour 123 represents a particularly uniform polygon, here a dodecagon, in Figure 7b a sine wave ring and in Figure 7c This means that during a filling process with a cylindrical filling pipe 108, air can escape through the opening 63 without holes 62 having to be provided in the insert 16. In the case of alternative designs of inserts 16, these can also be provided.

Fig. 12 shows a further possibility of producing the film bag 18. Instead of fastening the outside of the collar 30 to the inside of the film tube 26, the inside of the collar 30, as already explained, can also be fastened to the outside of the film tube 26.

The cover 14 can be designed as a monofilm. Based on 13a, 13b and 14 Embodiments of the cover 14 are shown in which the cover 14 is formed by several layers or by a plastic plate.

In the Figure 13a the cover 14 comprises five layers. A middle layer is implemented as a barrier layer 126, for example in the form of an aluminum layer. The layers are numbered from top to bottom in the figures, so that the top layer represents a first layer and a bottom layer represents a fifth layer. A second layer and a fourth layer are each implemented as a polyethylene layer (PE layer) 128. The top and bottom layers, that is to say the first layer and the fifth layer of the cover 14, are each implemented as a polypropylene layer (PP layer) 130.

The barrier layer 126 prevents water vapor and / or oxygen from entering the chamber 20. In particular in the case of chemically active masses, water vapor and / or oxygen can lead to the mass arranged in the chamber 20 reacting and thereby reducing its durability or changing its composition. In addition, because of the barrier layer 126, the material located in the chamber 20 can advantageously not outgas.

In Figure 13b shows an alternative structure of the cover 14 again with five layers. The middle layer is again designed as a barrier layer 126. In contrast to the execution according to Figure 13a For example, in addition to the second layer and the fourth layer 128, the first layer and the fifth layer 130 are also formed from polyethylene.

The configuration of the cover 14 in Fig. 14 again comprises five layers, with the barrier layer 126 forming the fourth layer. The first layer, the third layer and the fifth layer are each implemented as a PE layer 130 in this configuration. The second layer 132 is a layer 132 made of bi-axially arranged polypropylene.

As an alternative to this, the cover 14 can be designed with a particularly inherently rigid plastic plate, which preferably comprises PE, PP, PET, PVC, ABS, PA, PLA or comparable materials. The cover 14 is here again by gluing or welding to the insert 16 of the embodiment of FIG Fig. 2 or Figure 2b connected to the insert 16.

The configurations of the cover 14 according to FIG 13a, 13b and 14 are only to be understood as examples. In principle, any material mentioned at the beginning is possible for a layer of the cover 14 and any number of layers is also conceivable.

Based on FIGS. 15 to 19 In the following, various embodiments of predetermined breaking regions 88 are shown, which differ from one another with regard to their shape. In all of these figures, a detailed view of a top view of the cover 14 is shown, the predetermined breaking area 88 being more clearly visible in each case.

In Fig. 15 the predetermined breaking area 88 is designed in several parts and in the present case has eight sub-areas, each of which extends radially outward from a center 134 to the midpoint 134, so that the predetermined breaking area 88 forms a star-shaped pattern. The predetermined breaking area 88 thus represents, overall, a symmetrical, here point-symmetrical, pattern.

In Fig. 16 the predetermined breaking area 88 has four sub-areas, which in turn extend essentially in a straight line outward in the radial direction, so that the predetermined breaking area represents a cross-shaped pattern, which here is point-symmetrical to the midpoint 134.

The in Fig. 17 The predetermined breaking area 88 shown is formed by a line running in a straight line here.

In the design according to Fig. 18 the predetermined breaking area 88 is formed by a circular delimitation, which can be designed as a continuous line or as a perforation. The line or the perforation delimits the predetermined breaking area 88 from the further area of the cover 14 lying outside the line or the perforation.

In the execution according to Fig. 19 the predetermined breaking area 88 is defined by an essentially semicircular line, which in turn can be designed as a perforation or a continuous line.

Fig. 20 shows a side view and a top view of a further embodiment of a cartridge 10 with two foil bags 18, the foil bags 18 being connected to the head part 12 in a common welding process. The inherently rigid insert 16 is first connected to the film bag 18 and then filled with a compound 102 through the passage 60. Then again, the passage 60 is closed with the cover 14, the cover 14 being connected to the insert 16 in the manner described in more detail above and, in particular, being welded on.

The cover 14 is designed here to be weldable on both sides, so that in a further step the film bags 18 are connected to the head part 12 in a welding process. This is according to the execution Fig. 20 for both foil bags 18 with a common welding tool 136 and in the execution according to Fig. 21 for each foil bag 18 with two separate welding tools 138, 140 and thus can be carried out independently of one another, one welding tool 138 being assigned to one foil bag 18 and the other welding tool 140 being assigned to the other foil bag 18.

In this case, the inserts 16 have a corresponding counter-contour to the head part 12, so that the inserts 16, when connected to the head part 12, lie essentially flat on the head part 12 via the cover 14.

The respective, in Figures 20 and 21 The welding tool 136, 138, 140, shown only schematically, is guided from a side facing away from the head part 12 over the foil bag 18 to a contact area of the head part 12 with the insert 16, the welding tools 138, 140 corresponding to the respective foil bag 18 and the corresponding contours of the insert 16 and the head part 12 in the embodiment according to Fig. 21 Completely encompass the circumferential side, so that in each case a circumferentially completely circumferential connection is created between the head part 12 and the film bag 18 via the cover 14. The two film bags 18 can be connected to the head part 12 at the same time, partially overlapping or one after the other.

When executing according to Fig. 20 includes the common welding tool 140, with which the connection of the two foil bags 18 to the head part 12 is possible in a single work step, the foil bags 18 circumferentially, for example, except for a facing area of the foil bags 18, so that a connection completely encircling both foil bags 18 on the outside is created between the head part 12 and the two film bags 18 via the respective covers. It can be provided here that the inserts 16 are not connected to the head part 12 via the covers 14 in an area of the two film bags 18 facing one another.

To connect the head part 12 to the insert 16 or the inserts 16, an inductive and contactless welding process, for example a high-frequency welding process, is preferably provided. The cover 14 preferably has an aluminum layer which is heated during the welding process, the heat being conducted through the other layers of the cover 14 to the inserts, in particular made of plastic, and the head part 12, thereby achieving the weld. Here, a very targeted energy input is achieved at the point at which the welded connection is to be created.

The various configurations of the individual components are to be understood as examples. In particular, the various configurations and various features of the embodiments can be combined with one another as desired. The features and configurations listed as differences are independent and can be combined in various ways.

In the illustrated embodiments, the cartridge 10 comprises one or two chambers 20 and a corresponding number of covers 14, inserts 16, foil bags 18, receptacles 66 and outlet channels 80. In general, any number of the named components is possible.

Claims (15)

Method for producing a cartridge (10) for an extrusion device, by means of the following steps: - Provision of a film bag (18) having a chamber (20) with an opening (22), a head part (12) and an inherently rigid insert (16) with a passage (60), - connecting the insert (16) to the foil bag (18), - Filling the chamber (20) with a mass (102) through the passage (60), - Closing the passage (60) with a cover (14), characterized in that the insert (16) is connected to the head part (12) in a welding process, the welding process being carried out by introducing heat into the cover (14). Method according to Claim 1, characterized in that the insert (16) is connected to the head part (12) in an induction welding process. Method according to one of Claims 1 or 2, characterized in that a welding tool for carrying out the welding process from a side of the film bag (18) facing away from the head part (12) over the film bag (18) in the direction of the insert (16) and the head part ( 12) is performed. Method according to one of the preceding claims, characterized in that the welding tool is guided around a single film bag (18) for connecting the insert (16) assigned to this film bag (18) to the head part (12). Method according to one of Claims 1 to 3, characterized in that the welding tool is guided around at least two film bags (18) together to connect the inserts (16) assigned to the two film bags (18) to the head part (12). Method according to one of the preceding claims, characterized in that a defined predetermined breaking area is produced in the area of the cover. Method according to Claim 6, characterized in that the predetermined breaking area (88) of the cover (14) is produced by means of a laser, a weakening by hot stamping, by scoring or by welding the cover (14) to the insert (16). Method according to one of the preceding claims, characterized in that the insert (16) has at least one material extension (54), in particular a material extension (54) surrounding the passage (60), which melts during the closure of the passage (60). Cartridge (10) for an extrusion device produced by a method according to one of Claims 1 to 8, with at least one elongated film bag (18) which is not inherently rigid and which has a chamber (20) for receiving a mass (102), with a head part (12) for interaction with the film bag (18) and with an inherently rigid insert (16), the insert (16) being connected to the film bag (18) on a side facing the head part (12) and one of a cover ( 14) has closed passage (60),
characterized,
that the insert (16) and the head part (12) have, in areas facing each other, a respectively interacting and essentially oppositely designed contour, the cover (14) arranged in the area of the contours being weldable. Cartridge (10) according to Claim 9, characterized in that the contour of the insert (16) and of the head part (12) each have two surfaces (44, 46) arranged at an angle to one another. Cartridge (10) according to Claim 9, characterized in that the surfaces (44, 46) of the insert (16) and of the head part (12) are arranged essentially perpendicular to one another. Cartridge (10) according to one of claims 9 to 11, characterized in that the insert (16) has a stepped raised elevation (48) on its side facing the head part (12), via which the insert (16) is in a receptacle ( 66) of the head part (12), which is provided for the arrangement of the insert, is received. Cartridge (10) according to one of Claims 9 to 12, characterized in that the cover (14) has a predetermined breaking area (88). Cartridge (10) according to one of Claims 9 to 13, characterized in that the insert (16) is designed to be conical on a side facing the head part (12). Cartridge (10) according to one of Claims 9 to 14, characterized in that the insert (16) has at least one ventilation opening independent of the passage (60) (112) and / or has at least one ventilation slot (116) independent of the passage (60) and / or that the passage (60) of the insert (16) in an area facing the central axis of the film bag (18) has at least one ventilation notch ( 122).

Images